Physics of Sound

Front

What is sound?

Back

Sound is a type of energy made by vibrations. When an object vibrates, it causes the air around it to move, creating sound waves.

Front

What is pitch?

Back

Pitch is how high or low a sound is. It depends on the frequency of the sound waves; higher frequency means higher pitch.

Front

What is volume?

Back

Volume is how loud or soft a sound is. It is determined by the amplitude of the sound waves.

Front

What produces louder sounds?

Back

Louder sounds are produced by objects that vibrate with greater energy and have larger amplitudes.

Front

What is a sound wave?

Back

A sound wave is a wave that travels through air (or other mediums) and carries sound energy.

Front

How does the amount of water in a bottle affect the pitch?

Back

The less water in a bottle, the higher the pitch when tapped, because the air column above the water vibrates faster.

Front

What is a musical instrument?

Back

A musical instrument is an object that produces sound when played, such as a flute, saxophone, or drum.

Front

What is frequency?

Back

Frequency is the number of times a sound wave vibrates in one second, measured in Hertz (Hz).

Front

What is a vibration?

Back

A vibration is a rapid back-and-forth movement of an object, which creates sound.

Front

What is an echo?

Back

An echo is a sound that is reflected off a surface and heard again after a short delay.